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Finding the Fourth Proportional to 243.42, 336.30 and 206.96

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Solution

The fourth proportional to 243.42, 336.30 and 206.96 is: 285.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.42 : 336.30 = 206.96 : x
  2. Step 2: Convert to fraction form
    243.42/336.30 = 206.96/x
  3. Step 3: Cross multiply
    243.42x = 336.30 × 206.96
  4. Step 4: Simplify right side
    243.42x = 69,600.65
  5. Step 5: Solve for x
    x = 69,600.65/243.42
  6. Step 6: Final answer
    x = 285.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.